Correct "Manage Password" link in Quickling in Diffusion
Summary: Fixes T12080. This was missing a "/", but stop hard-coding these URIs.
Test Plan: Clicked both links with Quickling as a logged-in and logged-out user, ended up in the right place.
Reviewed By: chad
Maniphest Tasks: T12080
Differential Revision: https://secure.phabricator.com/D17151